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 `Generics` is a collection of generic thread-safe Go utility packages:
 
 - `Stack`: A LIFO ('Last In, First Out') stack implementation.
-- `Queue`: A FIFO ('First In, First Out') queue implementation.
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+- `Queue`: A FIFO ('First In, First Out') queue implementation.
+- `Cache`: A cache implementation.
+- `LRU Cache`: A LRU ('Last Recently Used') cache implementation.
+- `LFU Cache`: A LFU ('Least Frequently Used') cache implementation.